public async Task Get_Model_ReturnsConfigurationSetModelForClient()
        {
            var testContext = TestHttpContextBuilder.CreateForPath($"/{clientId}/{typeof(SampleConfigSet).Name}")
                              .WithClaims(readClaim).TestContext;
            var mappedModel = new ConfigurationSetModelPayload();

            modelPayloadMapper.Setup(m => m.Map(configCollection.GetConfigSetDefinition(typeof(SampleConfigSet)), It.Is <ConfigurationIdentity>(i => i.Client.Equals(expectedClient))))
            .ReturnsAsync(() => mappedModel);

            await target.Handle(testContext, options);

            responseFactory.Verify(v => v.BuildJsonResponse(testContext, mappedModel));
        }